If you have a few million to spend and fancy a flat in town then you might be interested in this one. On the market for £140 million this is One Hyde Park. The flat has a prime location in Knightsbridge,Central London with views over the city. It has a private wine tasting facility and an underground passage to what will be Heston Blumenthal’s new restaurant. The flat itself is a two floor apartment with floor to ceiling windows. It has its own car park and panic room. Security features include bullet proof windows, SAS trained security guards and an air purifier to counteract poison gas attacks. It also has access to spas and squash courts. Whoever buys it will need to pay a massive £5.6 million just in stamp duty.